Here is an infinite recursion error which occurs only with S4 subclasses assignment.
setClass("myenv", contains = "environment") #[1] "myenv" env <- new("myenv") env[[".me"]] <- e...@.xdata #Error: evaluation nested too deeply: infinite recursion / options(expressions=)? With basic types it works as expected: env1 <- new.env() env1[[".me"]] <- env1 May be this is related to active bindings that you mentioned, but I am still reporting it here. Vitally. > Thanks for the report. Should now be fixed in r-devel and 2.12 patched (rev > 53383). > > Please do report any cases where a subclass of environment doesn't work. > There are some known cases in locking and > active binding, that will be fixed in due course. > > The workaround for any such problem is usually as.environment(). > > On 10/20/10 3:17 AM, Vitaly S. wrote: >> Dear Developers, >> >> A lot has been changed in the R12.0 with respect to behavior of "environment" >> subclasses. Many thanks for that. >> >> One small irregularity, though; new.env does not allow the parent to be from >> S4 >> subclass. >> >> >>> setClass("myenv", contains="environment") >> [1] "myenv" >>> new.env(parent=new("myenv")) >> Error in new.env(parent = new("myenv")) : 'enclos' must be an environment >> >> I wonder if this is a "planed" behavior. >> >> The use of .xData slot obviously works: >>> new.env(parent=new("myenv")@.xData) >> <environment: 063bb9e8> >> Thanks, >> Vitaly. >> >> ______________________________________________ >> R-devel@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-devel> ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel